" Hands-free and wireless Foldable design easy to carrybr Adjustable headband lengthbr Noise canceling Crystal clear sound with DSP Can effectively Block the external noisebr Touch-button call answerend redial Touch-button volume controlbr Fits comfortably on both ear br Patuoxun® Foldable Stereo Bluetooth Headphones with Boom MIC Microphone Noise Canceling Earphones"